.header_52 {
    width: 100%;
    height: 85vh;
    overflow: auto;
}
.header_53{
    width: 100%;
    height: 95px;
    background-color: white;
}
.header_53 img {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    margin-top: 5px;
}
.header_53 span{
    display: inline-block;
    margin-top: 40px;
    min-height: 50%;
    border-radius: 10px;
    padding-top: 5px;
    box-sizing: border-box;
    background-color: #f5f5f5;
    white-space: normal;
    word-wrap: break-word;
}
.header_54{
    width: 100%;
    height: 95px;
    background-color: white;
}
.header_54 img{
    width: 55px;
    height: 55px;
    float: right;
    border-radius: 50%;
    margin-top: 5px;
}
.header_54 span{
    color: white;
    display: inline-block;
    float: right;
    margin-top: 40px;
    min-height: 50%;
    border-radius: 10px;
    padding-top: 5px;
    box-sizing: border-box;
    border: 1px solid white;
    background-color: black;
}
.header_56 {
    position: fixed;
    width: 100%;
    height: 50px;
    bottom: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center; 
}

.header_56 input {
    width: 200px;
    height: 30px;
    margin-left: 30%;
    border: 1px solid #eee;
}

.header_56 button {
    width: 50px;
    height: 30px;
    margin-right: 20px;
    border: none;
    background-color: white;
    color: green;
    font-size: larger;
}
.header_55{
    width: 100px;
    text-align: center;
}
.header_50{
    width: 100%;
    height: 45px;
    position: fixed;
    font-weight: 700;
}
.header_51{
    width: 100%;
    height: 40px;
}
.header_huo{
    width: 100vw;
    height: 100vh;
    background-color: #f5f5f5;
    margin: 0 auto;
    text-align: center;
    line-height: 100vh;
    font-size: 20px;
    font-weight: 700;
}
